/*
=====================================================
  BASE.CSS - LUXURY FURNITURE STORE
  Premium, sophisticated, and immersive design system
=====================================================
*/

/* =====================================================
   CSS VARIABLES
===================================================== */
:root {
  /* Color Palette - Luxury Theme */
  --color-cream: #FAF8F5;
  --color-gold: #D4AF37;
  --color-gold-light: #E8D4A0;
  --color-gold-dark: #B8941F;
  --color-charcoal: #2C2C2C;
  --color-charcoal-light: #3A3A3A;
  --color-navy: #1A2B3D;
  --color-navy-light: #2A3B4D;
  --color-champagne: #F3E5D1;
  --color-champagne-light: #F9F0E4;
  
  /* Semantic Colors */
  --color-background: var(--color-cream);
  --color-surface: #FFFFFF;
  --color-text-primary: var(--color-charcoal);
  --color-text-secondary: #5A5A5A;
  --color-text-muted: #8A8A8A;
  --color-text-inverse: var(--color-cream);
  
  --color-primary: var(--color-gold);
  --color-primary-hover: var(--color-gold-dark);
  --color-primary-light: var(--color-gold-light);
  
  --color-accent: var(--color-navy);
  --color-accent-hover: var(--color-navy-light);
  
  --color-success: #2E7D32;
  --color-success-light: #E8F5E9;
  --color-warning: #C17817;
  --color-warning-light: #FFF4E5;
  --color-danger: #C62828;
  --color-danger-light: #FFEBEE;
  
  /* Neutral Grays */
  --color-gray-50: #FAFAFA;
  --color-gray-100: #F5F5F5;
  --color-gray-200: #EEEEEE;
  --color-gray-300: #E0E0E0;
  --color-gray-400: #BDBDBD;
  --color-gray-500: #9E9E9E;
  --color-gray-600: #757575;
  --color-gray-700: #616161;
  --color-gray-800: #424242;
  --color-gray-900: #212121;
  
  /* Typography */
  --font-primary: 'Cormorant Garamond', 'Playfair Display', Georgia, serif;
  --font-secondary: 'Montserrat', 'Lato', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'SF Mono', Consolas, 'Liberation Mono', Menlo, monospace;
  
  /* Font Sizes */
  --text-xs: 0.75rem;      /* 12px */
  --text-sm: 0.875rem;     /* 14px */
  --text-base: 1rem;       /* 16px */
  --text-lg: 1.125rem;     /* 18px */
  --text-xl: 1.25rem;      /* 20px */
  --text-2xl: 1.5rem;      /* 24px */
  --text-3xl: 1.875rem;    /* 30px */
  --text-4xl: 2.25rem;     /* 36px */
  --text-5xl: 3rem;        /* 48px */
  --text-6xl: 3.75rem;     /* 60px */
  --text-7xl: 4.5rem;      /* 72px */
  
  /* Line Heights */
  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;
  
  /* Letter Spacing */
  --tracking-tighter: -0.05em;
  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;
  --tracking-wider: 0.05em;
  --tracking-widest: 0.1em;
  
  /* Spacing Scale */
  --space-0: 0;
  --space-1: 0.25rem;      /* 4px */
  --space-2: 0.5rem;       /* 8px */
  --space-3: 0.75rem;      /* 12px */
  --space-4: 1rem;         /* 16px */
  --space-5: 1.25rem;      /* 20px */
  --space-6: 1.5rem;       /* 24px */
  --space-8: 2rem;         /* 32px */
  --space-10: 2.5rem;      /* 40px */
  --space-12: 3rem;        /* 48px */
  --space-16: 4rem;        /* 64px */
  --space-20: 5rem;        /* 80px */
  --space-24: 6rem;        /* 96px */
  
  /* Border Radius */
  --radius-none: 0;
  --radius-sm: 0.125rem;   /* 2px */
  --radius-base: 0.25rem;  /* 4px */
  --radius-md: 0.375rem;   /* 6px */
  --radius-lg: 0.5rem;     /* 8px */
  --radius-xl: 0.75rem;    /* 12px */
  --radius-2xl: 1rem;      /* 16px */
  --radius-full: 9999px;
  
  /* Shadows - Luxury depth */
  --shadow-sm: 0 1px 2px 0 rgba(44, 44, 44, 0.05);
  --shadow-base: 0 2px 8px 0 rgba(44, 44, 44, 0.08);
  --shadow-md: 0 4px 16px 0 rgba(44, 44, 44, 0.1);
  --shadow-lg: 0 8px 24px 0 rgba(44, 44, 44, 0.12);
  --shadow-xl: 0 12px 32px 0 rgba(44, 44, 44, 0.15);
  --shadow-2xl: 0 16px 48px 0 rgba(44, 44, 44, 0.18);
  --shadow-gold: 0 4px 16px 0 rgba(212, 175, 55, 0.2);
  --shadow-inner: inset 0 2px 4px 0 rgba(44, 44, 44, 0.06);
  
  /* Transitions */
  --duration-fast: 150ms;
  --duration-base: 250ms;
  --duration-slow: 350ms;
  --duration-slower: 500ms;
  
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-luxury: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  
  /* Z-index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  
  /* Max Widths */
  --max-width-xs: 20rem;    /* 320px */
  --max-width-sm: 24rem;    /* 384px */
  --max-width-md: 28rem;    /* 448px */
  --max-width-lg: 32rem;    /* 512px */
  --max-width-xl: 36rem;    /* 576px */
  --max-width-2xl: 42rem;   /* 672px */
  --max-width-3xl: 48rem;   /* 768px */
  --max-width-4xl: 56rem;   /* 896px */
  --max-width-5xl: 64rem;   /* 1024px */
  --max-width-6xl: 72rem;   /* 1152px */
  --max-width-7xl: 80rem;   /* 1280px */
  --max-width-full: 100%;
}

/* =====================================================
   RESET & NORMALIZE
===================================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* =====================================================
   BASE STYLES
===================================================== */
body {
  font-family: var(--font-secondary);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  overflow-x: hidden;
  min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 400;
  line-height: var(--leading-tight);
  color: var(--color-charcoal);
  margin-bottom: var(--space-4);
  letter-spacing: var(--tracking-tight);
}

h1 {
  font-size: clamp(var(--text-4xl), 5vw, var(--text-7xl));
  margin-bottom: var(--space-8);
  letter-spacing: var(--tracking-tighter);
}

h2 {
  font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
  margin-bottom: var(--space-6);
}

h3 {
  font-size: clamp(var(--text-2xl), 3vw, var(--text-4xl));
  margin-bottom: var(--space-5);
}

h4 {
  font-size: clamp(var(--text-xl), 2.5vw, var(--text-3xl));
  margin-bottom: var(--space-4);
}

h5 {
  font-size: clamp(var(--text-lg), 2vw, var(--text-2xl));
  margin-bottom: var(--space-3);
}

h6 {
  font-size: clamp(var(--text-base), 1.5vw, var(--text-xl));
  margin-bottom: var(--space-3);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  font-family: var(--font-secondary);
  font-weight: 600;
}

p {
  margin-bottom: var(--space-4);
}

p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--duration-base) var(--ease-luxury);
}

a:hover {
  color: var(--color-primary-hover);
}

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

strong, b {
  font-weight: 600;
}

em, i {
  font-style: italic;
}

small {
  font-size: var(--text-sm);
}

blockquote {
  padding-left: var(--space-6);
  border-left: 3px solid var(--color-gold);
  font-family: var(--font-primary);
  font-size: var(--text-xl);
  font-style: italic;
  color: var(--color-text-secondary);
  margin: var(--space-8) 0;
}

code, pre {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

code {
  background-color: var(--color-gray-100);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}

pre {
  background-color: var(--color-gray-100);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  overflow-x: auto;
}

hr {
  border: none;
  border-top: 1px solid var(--color-gray-300);
  margin: var(--space-8) 0;
}

/* Lists */
ul, ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}

li {
  margin-bottom: var(--space-2);
}

ul ul,
ol ol,
ul ol,
ol ul {
  margin-bottom: 0;
  margin-top: var(--space-2);
}

/* Media */
img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

img {
  border-style: none;
}

figure {
  margin: var(--space-8) 0;
}

figcaption {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-align: center;
  margin-top: var(--space-3);
  font-style: italic;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-6);
}

th, td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--color-gray-300);
}

th {
  font-weight: 600;
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-secondary);
  background-color: var(--color-gray-50);
}

/* =====================================================
   UTILITY CLASSES
===================================================== */

/* Container */
.container {
  width: 100%;
  max-width: var(--max-width-7xl);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

.container-sm {
  max-width: var(--max-width-4xl);
}

.container-md {
  max-width: var(--max-width-5xl);
}

.container-lg {
  max-width: var(--max-width-6xl);
}

.container-full {
  max-width: 100%;
}

@media (min-width: 640px) {
  .container {
    padding-left: var(--space-8);
    padding-right: var(--space-8);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: var(--space-12);
    padding-right: var(--space-12);
  }
}

/* Flexbox Utilities */
.flex {
  display: flex;
}

.inline-flex {
  display: inline-flex;
}

.flex-row {
  flex-direction: row;
}

.flex-col {
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.flex-nowrap {
  flex-wrap: nowrap;
}

.items-start {
  align-items: flex-start;
}

.items-center {
  align-items: center;
}

.items-end {
  align-items: flex-end;
}

.items-stretch {
  align-items: stretch;
}

.justify-start {
  justify-content: flex-start;
}

.justify-center {
  justify-content: center;
}

.justify-end {
  justify-content: flex-end;
}

.justify-between {
  justify-content: space-between;
}

.justify-around {
  justify-content: space-around;
}

.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-5 { gap: var(--space-5); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }
.gap-10 { gap: var(--space-10); }
.gap-12 { gap: var(--space-12); }

/* Grid Utilities */
.grid {
  display: grid;
}

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
.grid-cols-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

@media (min-width: 640px) {
  .sm\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sm\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .md\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .lg\:grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

/* Text Utilities */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

.text-xs { font-size: var(--text-xs); }
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }
.text-2xl { font-size: var(--text-2xl); }

.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.uppercase { text-transform: uppercase; }
.lowercase { text-transform: lowercase; }
.capitalize { text-transform: capitalize; }

.tracking-tight { letter-spacing: var(--tracking-tight); }
.tracking-normal { letter-spacing: var(--tracking-normal); }
.tracking-wide { letter-spacing: var(--tracking-wide); }
.tracking-wider { letter-spacing: var(--tracking-wider); }

.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }
.text-gold { color: var(--color-gold); }
.text-navy { color: var(--color-navy); }
.text-white { color: white; }

/* Spacing Utilities */
.m-0 { margin: 0; }
.m-auto { margin: auto; }
.mx-auto { margin-left: auto; margin-right: auto; }
.my-auto { margin-top: auto; margin-bottom: auto; }

.p-0 { padding: 0; }

/* Visibility Utilities */
.hidden {
  display: none;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* =====================================================
   COMPONENTS
===================================================== */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  font-family: var(--font-secondary);
  font-size: var(--text-base);
  font-weight: 500;
  line-height: var(--leading-normal);
  text-align: center;
  text-decoration: none;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  white-space: nowrap;
  border: 2px solid transparent;
  border-radius: var(--radius-none);
  cursor: pointer;
  transition: all var(--duration-base) var(--ease-luxury);
  user-select: none;
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

.btn-primary {
  background-color: var(--color-gold);
  color: var(--color-charcoal)!important;
  border-color: var(--color-gold);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-gold-dark);
  border-color: var(--color-gold-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-gold);
}

.btn-secondary {
  background-color: var(--color-navy);
  color: var(--color-cream);
  border-color: var(--color-navy);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-navy-light);
  border-color: var(--color-navy-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-gold);
  border-color: var(--color-gold);
}

.btn-outline:hover:not(:disabled) {
  background-color: var(--color-gold);
  color: var(--color-charcoal);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-charcoal);
  border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
  background-color: var(--color-champagne-light);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-sm {
  padding: var(--space-2) var(--space-6);
  font-size: var(--text-sm);
}

.btn-lg {
  padding: var(--space-4) var(--space-12);
  font-size: var(--text-lg);
}

.btn-block {
  display: flex;
  width: 100%;
}

/* Form Elements */
.input,
.textarea,
.select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-secondary);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-surface);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-sm);
  transition: all var(--duration-base) var(--ease-out);
}

.input:hover,
.textarea:hover,
.select:hover {
  border-color: var(--color-gray-400);
}

.input:focus,
.textarea:focus,
.select:focus {
  outline: none;
  border-color: var(--color-gold);
  box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.1);
}

.input::placeholder,
.textarea::placeholder {
  color: var(--color-text-muted);
}

.input:disabled,
.textarea:disabled,
.select:disabled {
  background-color: var(--color-gray-100);
  cursor: not-allowed;
  opacity: 0.6;
}

.textarea {
  min-height: 120px;
  resize: vertical;
}

.label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-primary);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

.form-group {
  margin-bottom: var(--space-6);
}

.form-error {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-danger);
}

.checkbox,
.radio {
  width: auto;
  margin-right: var(--space-2);
}

/* Card Component */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-base);
  overflow: hidden;
  transition: all var(--duration-base) var(--ease-luxury);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-body {
  padding: var(--space-8);
}

.card-header {
  padding: var(--space-6) var(--space-8);
  border-bottom: 1px solid var(--color-gray-200);
}

.card-footer {
  padding: var(--space-6) var(--space-8);
  border-top: 1px solid var(--color-gray-200);
  background-color: var(--color-gray-50);
}

.card-image {
  width: 100%;
  height: auto;
  display: block;
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  border-radius: var(--radius-full);
}

.badge-primary {
  background-color: var(--color-gold-light);
  color: var(--color-charcoal);
}

.badge-success {
  background-color: var(--color-success-light);
  color: var(--color-success);
}

.badge-warning {
  background-color: var(--color-warning-light);
  color: var(--color-warning);
}

.badge-danger {
  background-color: var(--color-danger-light);
  color: var(--color-danger);
}

/* Alert */
.alert {
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-md);
  border-left: 4px solid;
  margin-bottom: var(--space-6);
}

.alert-success {
  background-color: var(--color-success-light);
  border-color: var(--color-success);
  color: var(--color-success);
}

.alert-warning {
  background-color: var(--color-warning-light);
  border-color: var(--color-warning);
  color: var(--color-warning);
}

.alert-danger {
  background-color: var(--color-danger-light);
  border-color: var(--color-danger);
  color: var(--color-danger);
}

/* Divider */
.divider {
  height: 1px;
  background-color: var(--color-gray-300);
  margin: var(--space-8) 0;
}

.divider-gold {
  background-color: var(--color-gold);
  height: 2px;
}

/* Loading Spinner */
.spinner {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 3px solid rgba(212, 175, 55, 0.2);
  border-top-color: var(--color-gold);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Overlay */
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(44, 44, 44, 0.6);
  backdrop-filter: blur(2px);
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-base) var(--ease-out);
}

.overlay.active {
  opacity: 1;
  visibility: visible;
}

/* =====================================================
   ACCESSIBILITY
===================================================== */

/* Focus visible for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
}

/* Skip to main content link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-gold);
  color: var(--color-charcoal);
  padding: var(--space-2) var(--space-4);
  text-decoration: none;
  z-index: 9999;
}

.skip-link:focus {
  top: 0;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .card:hover {
    transform: none;
  }
  
  .btn:hover {
    transform: none;
  }
}

/* =====================================================
   PRINT STYLES
===================================================== */
@media print {
  body {
    background: white;
    color: black;
  }
  
  .no-print {
    display: none !important;
  }
  
  a[href]:after {
    content: " (" attr(href) ")";
  }
}